Crosslinked ethylene-tetrafluoroethylene copolymer insulating material

Abstract

The invention is a crosslinked ethylene-tetrafluoroethylene copolymer insulating material. The crosslinked ethylene-tetrafluoroethylene copolymer insulating material comprises the following components in parts by mass: 100 parts of an ethylene-tetrafluoroethylene copolymer, 0.3-8 parts of a prepolymer crosslinking agent, 0.1-1 part of N, N'-bis[beta-(3,5-di-t-butyl-4-hydroxyphenyl) propionyl] hydrazine, 0.5-3 parts of 1,3,5-tris(3,5-di-tert-butyl 4-hydroxybenzyl)isocyanuric acid, 1-5 parts of antimony trioxide, 1-3 parts of antimony pentoxide, 0.1-2 parts of N, N'-ethylene bisstearamide, 0.1-0.5 part of pentaerythritol stearate and 0.1-3 parts of mineral oil, wherein the weight average molecular weight of the prepolymer crosslinking agent is 600-5000 and the weight part ratio of 1,3,5-tris(3,5-di-tert-butyl 4-hydroxybenzyl)isocyanuric acid to N, N'-bis[beta-(3,5-di-t-butyl-4-hydroxyphenyl) propionyl] hydrazine is 3: (0.9-1.2). By the crosslinked ethylene-tetrafluoroethylene copolymer insulating material, the problems that the smoke amount is high, the crosslinking agent is easy to self-polymerize and the requirements on the processing temperature is very rigorous during the processing of the current XETFE insulating material are solved and the domestic blank is filled up.

Description

technical field [0001] The invention relates to special wire and cable materials, in particular to radiation crosslinked ethylene-tetrafluoroethylene copolymer insulating material. Background technique [0002] Ethylene-tetrafluoroethylene copolymer (ETFE), also known as F40, is a transparent crystalline material with a melting point of 265-280°C. It is the strongest and lightest fluoroplastic. ETFE has excellent dielectric, insulating and mechanical properties, radiation resistance, crack resistance, aging resistance, various chemical solvent resistance, high and low temperature resistance, long-term working temperature between -65°C and 150°C. After ETFE resin is irradiated and cross-linked, its radiation resistance, tensile strength and aging resistance are greatly improved, and its long-term working temperature is increased to 200°C. It is widely used in special cable insulation materials, such as transportation, aviation, chemical and nuclear plants, Insulation of vari...

AI Technical Summary

Problems solved by technology

At present, the technology of X-ETFE insulating material is mastered by a few well-known foreign wire and cable manufacturers. It is expensive and has a long delivery cycle. In special times, sales control is implemented in my country.

The current XETFE insulation material produces a large amount of smoke during the production process and pollutes the environment; the crosslinking agent is easy to self-polymerize, and has strict requirements on processing temperature, poor thermal stability during processing, easy to turn yellow, and the color deepens after irradiation

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